Taguchi Methods: Signal-To-Noise Ratio for Quality Evaluation
To quality engineers, noise refers to any factor that alters a product's designated function. Signal-to-noise (S/N) ratios--commonly used to evaluate the quality of communications systems--can help keep this type of instability to a minimum in products and processes. This book illustrates various types of S/N ratios, using examples from mechanical, chemical, electrical, and measurement fields, and shows engineers how to use these ratios to evaluate quality and reliability of products and processes.
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analysis of variance ANOVA Table Appendix Table 1-2 Assignment and Results Calculation The S/N calibration equation Circuit coefficient columns Comparison Control factor decibel degrees of freedom density derivation deviation data effective divisor Equation Calibration error rate error term error variance evaluation experiment Factor f Factors and Levels following equation given indicative factor inner orthogonal array Input-Output Table intervals Japanese Standards Association linear effect linear equation measurement method multi-feed noise factors nominal-the-best characteristic number of data Number of levels number of replications Objective obtain the S/N optimal condition parameter design point proportional equation Potassium Bromide Quality Engineering reference point calibration reference point proportional Ri R2 S/N Ratio Calculation S/N Ratio Formulation seismic scale shown in Table signal factor levels standard S/N Ratio Taguchi Methods target value temperature three levels total variation transformed true value variability voltage zero point proportional